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geography - volcano

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  1. 1a volcano is a landform formed by [blank_start]magma ejected[blank_end] from the [blank_start]mantle[blank_end] onto the [blank_start]earth's surface[blank_end].
    a magma chamber is a [blank_start]reservoir of molten rocks[blank_end] beneath the [blank_start]earth's crust[blank_end].
    can be found at [blank_start]divergent plate boundaries[blank_end] and [blank_start]convergent plate boundaries[blank_end] where there is [blank_start]subduction[blank_end].
    [blank_start]magma rises[blank_end] as it is less dense than surrounding rocks.
    [blank_start]accumulates[blank_end] in the [blank_start]magma chamber[blank_end] where [blank_start]pressure builds up[blank_end] until the [blank_start]magma forces its way[blank_end] onto the [blank_start]earth's surface through vents[blank_end].
    1. Amagma ejected
    2. Bmantle
    3. Cearth's surface
    4. Dreservoir of molten rocks
    5. Eearth's crust
    6. Fdivergent plate boundaries
    7. Gconvergent plate boundaries
    8. Hsubduction
    9. Imagma rises
    10. Jaccumulates
    11. Kmagma chamber
    12. Lpressure builds up
    13. Mmagma forces its way
    14. Nearth's surface through vents
  2. 21) as more magma seeps into the magma chamber, the [blank_start]amount of pressure[blank_end] in the chamber [blank_start]builds up[blank_end], [blank_start]giving rise to a volcanic eruption.[blank_end]
    2) when a [blank_start]stratovolcano erupts,[blank_end] [blank_start]pyroclasts are released[blank_end]. the [blank_start]force of the volcanic eruption[blank_end] depends on the [blank_start]amount of pressure[blank_end] [blank_start]built up within the volcano.[blank_end]
    3) a [blank_start]new eruption of lava[blank_end] covers the [blank_start]pyroclasts[blank_end] and [blank_start]builds up to the volcano[blank_end]
    4) [blank_start]lava builds up around the vent[blank_end], [blank_start]solidifying[blank_end] to [blank_start]form a small volcanic cone.[blank_end]
    5) during to [blank_start]formation of the volcano[blank_end], the [blank_start]vent may become blocked[blank_end]. [blank_start]forces the magma to find[blank_end] a [blank_start]new exit route to the surface[blank_end]. a [blank_start]secondary cone[blank_end] of newer volcanic [blank_start]material[blank_end] will then [blank_start]develop[blank_end].
    6) the [blank_start]summit of a volcano[blank_end] may be [blank_start]blown off during an explosive eruption[blank_end]. the [blank_start]sides of the crater[blank_end] [blank_start]collapse inwards[blank_end] due to the [blank_start]loss of structural support[blank_end]. [blank_start]acaldera[blank_end] is formed.
    1. Aamount of pressure
    2. Bbuilds up
    3. Cgiving rise to a volcanic eruption.
    4. Dstratovolcano erupts,
    5. Epyroclasts are released
    6. Fforce of the volcanic eruption
    7. Gamount of pressure
    8. Hbuilt up within the volcano.
    9. Inew eruption of lava
    10. Jpyroclasts
    11. Kbuilds up to the volcano
    12. Llava builds up around the vent
    13. Msolidifying
    14. Nform a small volcanic cone.
    15. Ovent may become blocked
    16. Pformation of the volcano
    17. Qforces the magma to find
    18. Rnew exit route to the surface
    19. Ssecondary cone
    20. Tmaterial
    21. Udevelop
    22. Vsummit of a volcano
    23. Wblown off during an explosive eruption
    24. Xsides of the crater
    25. Ycollapse inwards
    26. Zloss of structural support
    27. AAacaldera
  3. 3viscosity: [blank_start]stickiness of the lava[blank_end] or its [blank_start]resistance to flow[blank_end]
    lower viscosity: [blank_start]less explosive volcanic eruptions[blank_end]
    high silica lava: [blank_start]more viscous[blank_end]
    - [blank_start]traps more gas easily[blank_end] -> [blank_start]build up[blank_end] of [blank_start]pressure[blank_end] below the earth's surface
    -magma rises towards earth's surface -> gases are able to expand
    - causes [blank_start]outward explosion.[blank_end]
    1. Astickiness of the lava
    2. Bresistance to flow
    3. Cless explosive volcanic eruptions
    4. Dmore viscous
    5. Etraps more gas easily
    6. Fbuild up
    7. Gpressure
    8. Houtward explosion.

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Description
GCE O-Level Geography :D Quiz on geography - volcano , created by :D :D on 03/05/2018.
Author
:D :D
Language
English
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